implemented omnidirectional shadowmapping using depth textures (2D, Rect
[divverent/darkplaces.git] / gl_rsurf.c
1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12
13 See the GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18
19 */
20 // r_surf.c: surface-related refresh code
21
22 #include "quakedef.h"
23 #include "r_shadow.h"
24 #include "portals.h"
25
26 #define MAX_LIGHTMAP_SIZE 256
27
28 cvar_t r_ambient = {0, "r_ambient", "0", "brightens map, value is 0-128"};
29 cvar_t r_lockpvs = {0, "r_lockpvs", "0", "disables pvs switching, allows you to walk around and inspect what is visible from a given location in the map (anything not visible from your current location will not be drawn)"};
30 cvar_t r_lockvisibility = {0, "r_lockvisibility", "0", "disables visibility updates, allows you to walk around and inspect what is visible from a given viewpoint in the map (anything offscreen at the moment this is enabled will not be drawn)"};
31 cvar_t r_useportalculling = {0, "r_useportalculling", "1", "improve framerate with r_novis 1 by using portal culling - still not as good as compiled visibility data in the map, but it helps (a value of 2 forces use of this even with vis data, which improves framerates in maps without too much complexity, but hurts in extremely complex maps, which is why 2 is not the default mode)"};
32 cvar_t r_q3bsp_renderskydepth = {0, "r_q3bsp_renderskydepth", "0", "draws sky depth masking in q3 maps (as in q1 maps), this means for example that sky polygons can hide other things"};
33
34 /*
35 ===============
36 R_BuildLightMap
37
38 Combine and scale multiple lightmaps into the 8.8 format in blocklights
39 ===============
40 */
41 void R_BuildLightMap (const entity_render_t *ent, msurface_t *surface)
42 {
43         int smax, tmax, i, size, size3, maps, l;
44         int *bl, scale;
45         unsigned char *lightmap, *out, *stain;
46         dp_model_t *model = ent->model;
47         int *intblocklights;
48         unsigned char *templight;
49
50         smax = (surface->lightmapinfo->extents[0]>>4)+1;
51         tmax = (surface->lightmapinfo->extents[1]>>4)+1;
52         size = smax*tmax;
53         size3 = size*3;
54
55         r_refdef.stats.lightmapupdatepixels += size;
56         r_refdef.stats.lightmapupdates++;
57
58         if (cl.buildlightmapmemorysize < size*sizeof(int[3]))
59         {
60                 cl.buildlightmapmemorysize = size*sizeof(int[3]);
61                 if (cl.buildlightmapmemory)
62                         Mem_Free(cl.buildlightmapmemory);
63                 cl.buildlightmapmemory = (unsigned char *) Mem_Alloc(cls.levelmempool, cl.buildlightmapmemorysize);
64         }
65
66         // these both point at the same buffer, templight is only used for final
67         // processing and can replace the intblocklights data as it goes
68         intblocklights = (int *)cl.buildlightmapmemory;
69         templight = (unsigned char *)cl.buildlightmapmemory;
70
71         // update cached lighting info
72         model->brushq1.lightmapupdateflags[surface - model->data_surfaces] = false;
73
74         lightmap = surface->lightmapinfo->samples;
75
76 // set to full bright if no light data
77         bl = intblocklights;
78         if (!model->brushq1.lightdata)
79         {
80                 for (i = 0;i < size3;i++)
81                         bl[i] = 128*256;
82         }
83         else
84         {
85 // clear to no light
86                 memset(bl, 0, size3*sizeof(*bl));
87
88 // add all the lightmaps
89                 if (lightmap)
90                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3)
91                                 for (scale = r_refdef.scene.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size3;i++)
92                                         bl[i] += lightmap[i] * scale;
93         }
94
95         stain = surface->lightmapinfo->stainsamples;
96         bl = intblocklights;
97         out = templight;
98         // the >> 16 shift adjusts down 8 bits to account for the stainmap
99         // scaling, and remaps the 0-65536 (2x overbright) to 0-256, it will
100         // be doubled during rendering to achieve 2x overbright
101         // (0 = 0.0, 128 = 1.0, 256 = 2.0)
102         if (stain)
103         {
104                 for (i = 0;i < size;i++, bl += 3, stain += 3, out += 4)
105                 {
106                         l = (bl[0] * stain[0]) >> 16;out[2] = min(l, 255);
107                         l = (bl[1] * stain[1]) >> 16;out[1] = min(l, 255);
108                         l = (bl[2] * stain[2]) >> 16;out[0] = min(l, 255);
109                         out[3] = 255;
110                 }
111         }
112         else
113         {
114                 for (i = 0;i < size;i++, bl += 3, out += 4)
115                 {
116                         l = bl[0] >> 8;out[2] = min(l, 255);
117                         l = bl[1] >> 8;out[1] = min(l, 255);
118                         l = bl[2] >> 8;out[0] = min(l, 255);
119                         out[3] = 255;
120                 }
121         }
122
123         R_UpdateTexture(surface->lightmaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
124
125         // update the surface's deluxemap if it has one
126         if (surface->deluxemaptexture != r_texture_blanknormalmap)
127         {
128                 vec3_t n;
129                 unsigned char *normalmap = surface->lightmapinfo->nmapsamples;
130                 lightmap = surface->lightmapinfo->samples;
131                 // clear to no normalmap
132                 bl = intblocklights;
133                 memset(bl, 0, size3*sizeof(*bl));
134                 // add all the normalmaps
135                 if (lightmap && normalmap)
136                 {
137                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3, normalmap += size3)
138                         {
139                                 for (scale = r_refdef.scene.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size;i++)
140                                 {
141                                         // add the normalmap with weighting proportional to the style's lightmap intensity
142                                         l = (int)(VectorLength(lightmap + i*3) * scale);
143                                         bl[i*3+0] += ((int)normalmap[i*3+0] - 128) * l;
144                                         bl[i*3+1] += ((int)normalmap[i*3+1] - 128) * l;
145                                         bl[i*3+2] += ((int)normalmap[i*3+2] - 128) * l;
146                                 }
147                         }
148                 }
149                 bl = intblocklights;
150                 out = templight;
151                 // we simply renormalize the weighted normals to get a valid deluxemap
152                 for (i = 0;i < size;i++, bl += 3, out += 4)
153                 {
154                         VectorCopy(bl, n);
155                         VectorNormalize(n);
156                         l = (int)(n[0] * 128 + 128);out[2] = bound(0, l, 255);
157                         l = (int)(n[1] * 128 + 128);out[1] = bound(0, l, 255);
158                         l = (int)(n[2] * 128 + 128);out[0] = bound(0, l, 255);
159                         out[3] = 255;
160                 }
161                 R_UpdateTexture(surface->deluxemaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
162         }
163 }
164
165 void R_StainNode (mnode_t *node, dp_model_t *model, const vec3_t origin, float radius, const float fcolor[8])
166 {
167         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
168         msurface_t *surface, *endsurface;
169         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
170         unsigned char *bl;
171         vec3_t impact;
172
173         maxdist = radius * radius;
174         invradius = 1.0f / radius;
175
176 loc0:
177         if (!node->plane)
178                 return;
179         ndist = PlaneDiff(origin, node->plane);
180         if (ndist > radius)
181         {
182                 node = node->children[0];
183                 goto loc0;
184         }
185         if (ndist < -radius)
186         {
187                 node = node->children[1];
188                 goto loc0;
189         }
190
191         dist2 = ndist * ndist;
192         maxdist3 = maxdist - dist2;
193
194         if (node->plane->type < 3)
195         {
196                 VectorCopy(origin, impact);
197                 impact[node->plane->type] -= ndist;
198         }
199         else
200         {
201                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
202                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
203                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
204         }
205
206         for (surface = model->data_surfaces + node->firstsurface, endsurface = surface + node->numsurfaces;surface < endsurface;surface++)
207         {
208                 if (surface->lightmapinfo->stainsamples)
209                 {
210                         smax = (surface->lightmapinfo->extents[0] >> 4) + 1;
211                         tmax = (surface->lightmapinfo->extents[1] >> 4) + 1;
212
213                         impacts = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3] - surface->lightmapinfo->texturemins[0]);
214                         impactt = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3] - surface->lightmapinfo->texturemins[1]);
215
216                         s = bound(0, impacts, smax * 16) - impacts;
217                         t = bound(0, impactt, tmax * 16) - impactt;
218                         i = (int)(s * s + t * t + dist2);
219                         if ((i > maxdist) || (smax > (int)(sizeof(sdtable)/sizeof(sdtable[0])))) // smax overflow fix from Andreas Dehmel
220                                 continue;
221
222                         // reduce calculations
223                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
224                                 sdtable[s] = i * i + dist2;
225
226                         bl = surface->lightmapinfo->stainsamples;
227                         smax3 = smax * 3;
228                         stained = false;
229
230                         i = impactt;
231                         for (t = 0;t < tmax;t++, i -= 16)
232                         {
233                                 td = i * i;
234                                 // make sure some part of it is visible on this line
235                                 if (td < maxdist3)
236                                 {
237                                         maxdist2 = maxdist - td;
238                                         for (s = 0;s < smax;s++)
239                                         {
240                                                 if (sdtable[s] < maxdist2)
241                                                 {
242                                                         ratio = lhrandom(0.0f, 1.0f);
243                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
244                                                         if (a >= (1.0f / 64.0f))
245                                                         {
246                                                                 if (a > 1)
247                                                                         a = 1;
248                                                                 bl[0] = (unsigned char) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
249                                                                 bl[1] = (unsigned char) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
250                                                                 bl[2] = (unsigned char) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
251                                                                 stained = true;
252                                                         }
253                                                 }
254                                                 bl += 3;
255                                         }
256                                 }
257                                 else // skip line
258                                         bl += smax3;
259                         }
260                         // force lightmap upload
261                         if (stained)
262                                 model->brushq1.lightmapupdateflags[surface - model->data_surfaces] = true;
263                 }
264         }
265
266         if (node->children[0]->plane)
267         {
268                 if (node->children[1]->plane)
269                 {
270                         R_StainNode(node->children[0], model, origin, radius, fcolor);
271                         node = node->children[1];
272                         goto loc0;
273                 }
274                 else
275                 {
276                         node = node->children[0];
277                         goto loc0;
278                 }
279         }
280         else if (node->children[1]->plane)
281         {
282                 node = node->children[1];
283                 goto loc0;
284         }
285 }
286
287 void R_Stain (const vec3_t origin, float radius, int cr1, int cg1, int cb1, int ca1, int cr2, int cg2, int cb2, int ca2)
288 {
289         int n;
290         float fcolor[8];
291         entity_render_t *ent;
292         dp_model_t *model;
293         vec3_t org;
294         if (r_refdef.scene.worldmodel == NULL || !r_refdef.scene.worldmodel->brush.data_nodes || !r_refdef.scene.worldmodel->brushq1.lightdata)
295                 return;
296         fcolor[0] = cr1;
297         fcolor[1] = cg1;
298         fcolor[2] = cb1;
299         fcolor[3] = ca1 * (1.0f / 64.0f);
300         fcolor[4] = cr2 - cr1;
301         fcolor[5] = cg2 - cg1;
302         fcolor[6] = cb2 - cb1;
303         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
304
305         R_StainNode(r_refdef.scene.worldmodel->brush.data_nodes + r_refdef.scene.worldmodel->brushq1.hulls[0].firstclipnode, r_refdef.scene.worldmodel, origin, radius, fcolor);
306
307         // look for embedded bmodels
308         for (n = 0;n < cl.num_brushmodel_entities;n++)
309         {
310                 ent = &cl.entities[cl.brushmodel_entities[n]].render;
311                 model = ent->model;
312                 if (model && model->name[0] == '*')
313                 {
314                         if (model->brush.data_nodes)
315                         {
316                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
317                                 R_StainNode(model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, model, org, radius, fcolor);
318                         }
319                 }
320         }
321 }
322
323
324 /*
325 =============================================================
326
327         BRUSH MODELS
328
329 =============================================================
330 */
331
332 static void R_DrawPortal_Callback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
333 {
334         // due to the hacky nature of this function's parameters, this is never
335         // called with a batch, so numsurfaces is always 1, and the surfacelist
336         // contains only a leaf number for coloring purposes
337         const mportal_t *portal = (mportal_t *)ent;
338         qboolean isvis;
339         int i, numpoints;
340         float *v;
341         float vertex3f[POLYGONELEMENTS_MAXPOINTS*3];
342         CHECKGLERROR
343         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
344         GL_DepthMask(false);
345         GL_DepthRange(0, 1);
346         GL_PolygonOffset(r_refdef.polygonfactor, r_refdef.polygonoffset);
347         GL_DepthTest(true);
348         GL_CullFace(GL_NONE);
349         R_Mesh_Matrix(&identitymatrix);
350
351         numpoints = min(portal->numpoints, POLYGONELEMENTS_MAXPOINTS);
352
353         R_Mesh_VertexPointer(vertex3f, 0, 0);
354         R_Mesh_ColorPointer(NULL, 0, 0);
355         R_Mesh_ResetTextureState();
356         R_SetupGenericShader(false);
357
358         isvis = (portal->here->clusterindex >= 0 && portal->past->clusterindex >= 0 && portal->here->clusterindex != portal->past->clusterindex);
359
360         i = surfacelist[0] >> 1;
361         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f) * r_refdef.view.colorscale,
362                          ((i & 0x0038) >> 3) * (1.0f / 7.0f) * r_refdef.view.colorscale,
363                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f) * r_refdef.view.colorscale,
364                          isvis ? 0.125f : 0.03125f);
365         for (i = 0, v = vertex3f;i < numpoints;i++, v += 3)
366                 VectorCopy(portal->points[i].position, v);
367         R_Mesh_Draw(0, numpoints, 0, numpoints - 2, NULL, polygonelements, 0, 0);
368 }
369
370 // LordHavoc: this is just a nice debugging tool, very slow
371 void R_DrawPortals(void)
372 {
373         int i, leafnum;
374         mportal_t *portal;
375         float center[3], f;
376         dp_model_t *model = r_refdef.scene.worldmodel;
377         if (model == NULL)
378                 return;
379         for (leafnum = 0;leafnum < r_refdef.scene.worldmodel->brush.num_leafs;leafnum++)
380         {
381                 if (r_refdef.viewcache.world_leafvisible[leafnum])
382                 {
383                         //for (portalnum = 0, portal = model->brush.data_portals;portalnum < model->brush.num_portals;portalnum++, portal++)
384                         for (portal = r_refdef.scene.worldmodel->brush.data_leafs[leafnum].portals;portal;portal = portal->next)
385                         {
386                                 if (portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
387                                 if (!R_CullBox(portal->mins, portal->maxs))
388                                 {
389                                         VectorClear(center);
390                                         for (i = 0;i < portal->numpoints;i++)
391                                                 VectorAdd(center, portal->points[i].position, center);
392                                         f = ixtable[portal->numpoints];
393                                         VectorScale(center, f, center);
394                                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, (entity_render_t *)portal, leafnum, rsurface.rtlight);
395                                 }
396                         }
397                 }
398         }
399 }
400
401 void R_View_WorldVisibility(qboolean forcenovis)
402 {
403         int i, j, *mark;
404         mleaf_t *leaf;
405         mleaf_t *viewleaf;
406         dp_model_t *model = r_refdef.scene.worldmodel;
407
408         if (!model)
409                 return;
410
411         if (r_refdef.view.usecustompvs)
412         {
413                 // clear the visible surface and leaf flags arrays
414                 memset(r_refdef.viewcache.world_surfacevisible, 0, model->num_surfaces);
415                 memset(r_refdef.viewcache.world_leafvisible, 0, model->brush.num_leafs);
416                 r_refdef.viewcache.world_novis = false;
417
418                 // simply cull each marked leaf to the frustum (view pyramid)
419                 for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
420                 {
421                         // if leaf is in current pvs and on the screen, mark its surfaces
422                         if (CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
423                         {
424                                 r_refdef.stats.world_leafs++;
425                                 r_refdef.viewcache.world_leafvisible[j] = true;
426                                 if (leaf->numleafsurfaces)
427                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
428                                                 r_refdef.viewcache.world_surfacevisible[*mark] = true;
429                         }
430                 }
431                 return;
432         }
433
434         // if possible find the leaf the view origin is in
435         viewleaf = model->brush.PointInLeaf ? model->brush.PointInLeaf(model, r_refdef.view.origin) : NULL;
436         // if possible fetch the visible cluster bits
437         if (!r_lockpvs.integer && model->brush.FatPVS)
438                 model->brush.FatPVS(model, r_refdef.view.origin, 2, r_refdef.viewcache.world_pvsbits, sizeof(r_refdef.viewcache.world_pvsbits), false);
439
440         if (!r_lockvisibility.integer)
441         {
442                 // clear the visible surface and leaf flags arrays
443                 memset(r_refdef.viewcache.world_surfacevisible, 0, model->num_surfaces);
444                 memset(r_refdef.viewcache.world_leafvisible, 0, model->brush.num_leafs);
445
446                 r_refdef.viewcache.world_novis = false;
447
448                 // if floating around in the void (no pvs data available, and no
449                 // portals available), simply use all on-screen leafs.
450                 if (!viewleaf || viewleaf->clusterindex < 0 || forcenovis)
451                 {
452                         // no visibility method: (used when floating around in the void)
453                         // simply cull each leaf to the frustum (view pyramid)
454                         // similar to quake's RecursiveWorldNode but without cache misses
455                         r_refdef.viewcache.world_novis = true;
456                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
457                         {
458                                 // if leaf is in current pvs and on the screen, mark its surfaces
459                                 if (!R_CullBox(leaf->mins, leaf->maxs))
460                                 {
461                                         r_refdef.stats.world_leafs++;
462                                         r_refdef.viewcache.world_leafvisible[j] = true;
463                                         if (leaf->numleafsurfaces)
464                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
465                                                         r_refdef.viewcache.world_surfacevisible[*mark] = true;
466                                 }
467                         }
468                 }
469                 // just check if each leaf in the PVS is on screen
470                 // (unless portal culling is enabled)
471                 else if (!model->brush.data_portals || r_useportalculling.integer < 1 || (r_useportalculling.integer < 2 && !r_novis.integer))
472                 {
473                         // pvs method:
474                         // simply check if each leaf is in the Potentially Visible Set,
475                         // and cull to frustum (view pyramid)
476                         // similar to quake's RecursiveWorldNode but without cache misses
477                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
478                         {
479                                 // if leaf is in current pvs and on the screen, mark its surfaces
480                                 if (CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
481                                 {
482                                         r_refdef.stats.world_leafs++;
483                                         r_refdef.viewcache.world_leafvisible[j] = true;
484                                         if (leaf->numleafsurfaces)
485                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
486                                                         r_refdef.viewcache.world_surfacevisible[*mark] = true;
487                                 }
488                         }
489                 }
490                 // if desired use a recursive portal flow, culling each portal to
491                 // frustum and checking if the leaf the portal leads to is in the pvs
492                 else
493                 {
494                         int leafstackpos;
495                         mportal_t *p;
496                         mleaf_t *leafstack[8192];
497                         // simple-frustum portal method:
498                         // follows portals leading outward from viewleaf, does not venture
499                         // offscreen or into leafs that are not visible, faster than
500                         // Quake's RecursiveWorldNode and vastly better in unvised maps,
501                         // often culls some surfaces that pvs alone would miss
502                         // (such as a room in pvs that is hidden behind a wall, but the
503                         //  passage leading to the room is off-screen)
504                         leafstack[0] = viewleaf;
505                         leafstackpos = 1;
506                         while (leafstackpos)
507                         {
508                                 leaf = leafstack[--leafstackpos];
509                                 if (r_refdef.viewcache.world_leafvisible[leaf - model->brush.data_leafs])
510                                         continue;
511                                 r_refdef.stats.world_leafs++;
512                                 r_refdef.viewcache.world_leafvisible[leaf - model->brush.data_leafs] = true;
513                                 // mark any surfaces bounding this leaf
514                                 if (leaf->numleafsurfaces)
515                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
516                                                 r_refdef.viewcache.world_surfacevisible[*mark] = true;
517                                 // follow portals into other leafs
518                                 // the checks are:
519                                 // if viewer is behind portal (portal faces outward into the scene)
520                                 // and the portal polygon's bounding box is on the screen
521                                 // and the leaf has not been visited yet
522                                 // and the leaf is visible in the pvs
523                                 // (the first two checks won't cause as many cache misses as the leaf checks)
524                                 for (p = leaf->portals;p;p = p->next)
525                                 {
526                                         r_refdef.stats.world_portals++;
527                                         if (DotProduct(r_refdef.view.origin, p->plane.normal) < (p->plane.dist + 1)
528                                          && !r_refdef.viewcache.world_leafvisible[p->past - model->brush.data_leafs]
529                                          && CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, p->past->clusterindex)
530                                          && !R_CullBox(p->mins, p->maxs)
531                                          && leafstackpos < (int)(sizeof(leafstack) / sizeof(leafstack[0])))
532                                                 leafstack[leafstackpos++] = p->past;
533                                 }
534                         }
535                 }
536         }
537 }
538
539 void R_Q1BSP_DrawSky(entity_render_t *ent)
540 {
541         if (ent->model == NULL)
542                 return;
543         if (ent == r_refdef.scene.worldentity)
544                 R_DrawWorldSurfaces(true, true, false, false);
545         else
546                 R_DrawModelSurfaces(ent, true, true, false, false);
547 }
548
549 extern void R_Water_AddWaterPlane(msurface_t *surface);
550 void R_Q1BSP_DrawAddWaterPlanes(entity_render_t *ent)
551 {
552         int i, j, flagsmask;
553         dp_model_t *model = ent->model;
554         msurface_t *surfaces;
555         if (model == NULL)
556                 return;
557
558         if (ent == r_refdef.scene.worldentity)
559                 RSurf_ActiveWorldEntity();
560         else
561                 RSurf_ActiveModelEntity(ent, false, false);
562
563         surfaces = model->data_surfaces;
564         flagsmask = MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION;
565
566         // add visible surfaces to draw list
567         if (ent == r_refdef.scene.worldentity)
568         {
569                 for (i = 0;i < model->nummodelsurfaces;i++)
570                 {
571                         j = model->sortedmodelsurfaces[i];
572                         if (r_refdef.viewcache.world_surfacevisible[j])
573                                 if (surfaces[j].texture->basematerialflags & flagsmask)
574                                         R_Water_AddWaterPlane(surfaces + j);
575                 }
576         }
577         else
578         {
579                 for (i = 0;i < model->nummodelsurfaces;i++)
580                 {
581                         j = model->sortedmodelsurfaces[i];
582                         if (surfaces[j].texture->basematerialflags & flagsmask)
583                                 R_Water_AddWaterPlane(surfaces + j);
584                 }
585         }
586         rsurface.entity = NULL; // used only by R_GetCurrentTexture and RSurf_ActiveWorldEntity/RSurf_ActiveModelEntity
587 }
588
589 void R_Q1BSP_Draw(entity_render_t *ent)
590 {
591         dp_model_t *model = ent->model;
592         if (model == NULL)
593                 return;
594         if (ent == r_refdef.scene.worldentity)
595                 R_DrawWorldSurfaces(false, true, false, false);
596         else
597                 R_DrawModelSurfaces(ent, false, true, false, false);
598 }
599
600 void R_Q1BSP_DrawDepth(entity_render_t *ent)
601 {
602         dp_model_t *model = ent->model;
603         if (model == NULL)
604                 return;
605         GL_ColorMask(0,0,0,0);
606         GL_Color(1,1,1,1);
607         GL_DepthTest(true);
608         GL_BlendFunc(GL_ONE, GL_ZERO);
609         GL_DepthMask(true);
610         GL_AlphaTest(false);
611         R_Mesh_ColorPointer(NULL, 0, 0);
612         R_Mesh_ResetTextureState();
613         R_SetupDepthOrShadowShader();
614         if (ent == r_refdef.scene.worldentity)
615                 R_DrawWorldSurfaces(false, false, true, false);
616         else
617                 R_DrawModelSurfaces(ent, false, false, true, false);
618         GL_ColorMask(r_refdef.view.colormask[0], r_refdef.view.colormask[1], r_refdef.view.colormask[2], 1);
619 }
620
621 void R_Q1BSP_DrawDebug(entity_render_t *ent)
622 {
623         if (ent->model == NULL)
624                 return;
625         if (ent == r_refdef.scene.worldentity)
626                 R_DrawWorldSurfaces(false, false, false, true);
627         else
628                 R_DrawModelSurfaces(ent, false, false, false, true);
629 }
630
631 typedef struct r_q1bsp_getlightinfo_s
632 {
633         dp_model_t *model;
634         vec3_t relativelightorigin;
635         float lightradius;
636         int *outleaflist;
637         unsigned char *outleafpvs;
638         int outnumleafs;
639         unsigned char *visitingleafpvs;
640         int *outsurfacelist;
641         unsigned char *outsurfacepvs;
642         unsigned char *tempsurfacepvs;
643         unsigned char *outshadowtrispvs;
644         unsigned char *outlighttrispvs;
645         int outnumsurfaces;
646         vec3_t outmins;
647         vec3_t outmaxs;
648         vec3_t lightmins;
649         vec3_t lightmaxs;
650         const unsigned char *pvs;
651         qboolean svbsp_active;
652         qboolean svbsp_insertoccluder;
653 }
654 r_q1bsp_getlightinfo_t;
655
656 static void R_Q1BSP_RecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, mnode_t *node)
657 {
658         int sides;
659         mleaf_t *leaf;
660         for (;;)
661         {
662                 mplane_t *plane = node->plane;
663                 //if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
664                 //      return;
665                 if (!plane)
666                         break;
667                 //if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, rsurface.rtlight_numfrustumplanes, rsurface.rtlight_frustumplanes))
668                 //      return;
669                 if (plane->type < 3)
670                 {
671                         if (info->lightmins[plane->type] > plane->dist)
672                                 node = node->children[0];
673                         else if (info->lightmaxs[plane->type] < plane->dist)
674                                 node = node->children[1];
675                         else if (info->relativelightorigin[plane->type] >= plane->dist)
676                         {
677                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
678                                 node = node->children[1];
679                         }
680                         else
681                         {
682                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
683                                 node = node->children[0];
684                         }
685                 }
686                 else
687                 {
688                         sides = BoxOnPlaneSide(info->lightmins, info->lightmaxs, plane);
689                         if (sides == 3)
690                         {
691                                 // recurse front side first because the svbsp building prefers it
692                                 if (PlaneDist(info->relativelightorigin, plane) >= 0)
693                                 {
694                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
695                                         node = node->children[1];
696                                 }
697                                 else
698                                 {
699                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
700                                         node = node->children[0];
701                                 }
702                         }
703                         else if (sides == 0)
704                                 return; // ERROR: NAN bounding box!
705                         else
706                                 node = node->children[sides - 1];
707                 }
708         }
709         if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, rsurface.rtlight_numfrustumplanes, rsurface.rtlight_frustumplanes))
710                 return;
711         leaf = (mleaf_t *)node;
712         if (info->svbsp_active)
713         {
714                 int i;
715                 mportal_t *portal;
716                 double points[128][3];
717                 for (portal = leaf->portals;portal;portal = portal->next)
718                 {
719                         for (i = 0;i < portal->numpoints;i++)
720                                 VectorCopy(portal->points[i].position, points[i]);
721                         if (SVBSP_AddPolygon(&r_svbsp, portal->numpoints, points[0], false, NULL, NULL, 0) & 2)
722                                 break;
723                 }
724                 if (portal == NULL)
725                         return; // no portals of this leaf visible
726         }
727         else
728         {
729                 if (r_shadow_frontsidecasting.integer && info->pvs != NULL && !CHECKPVSBIT(info->pvs, leaf->clusterindex))
730                         return;
731         }
732         // inserting occluders does not alter the leaf info
733         if (!info->svbsp_insertoccluder)
734         {
735                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
736                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
737                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
738                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
739                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
740                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
741                 if (info->outleafpvs)
742                 {
743                         int leafindex = leaf - info->model->brush.data_leafs;
744                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
745                         {
746                                 SETPVSBIT(info->outleafpvs, leafindex);
747                                 info->outleaflist[info->outnumleafs++] = leafindex;
748                         }
749                 }
750         }
751         if (info->outsurfacepvs)
752         {
753                 int leafsurfaceindex;
754                 int surfaceindex;
755                 int triangleindex, t;
756                 int currentmaterialflags;
757                 msurface_t *surface;
758                 const int *e;
759                 const vec_t *v[3];
760                 double v2[3][3];
761                 for (leafsurfaceindex = 0;leafsurfaceindex < leaf->numleafsurfaces;leafsurfaceindex++)
762                 {
763                         surfaceindex = leaf->firstleafsurface[leafsurfaceindex];
764                         if (!CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
765                         {
766                                 surface = info->model->data_surfaces + surfaceindex;
767                                 currentmaterialflags = R_GetCurrentTexture(surface->texture)->currentmaterialflags;
768                                 if (BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs)
769                                  && (!info->svbsp_insertoccluder || !(currentmaterialflags & MATERIALFLAG_NOSHADOW)))
770                                 {
771                                         qboolean addedtris = false;
772                                         qboolean insidebox = BoxInsideBox(surface->mins, surface->maxs, info->lightmins, info->lightmaxs);
773                                         for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
774                                         {
775                                                 v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
776                                                 v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
777                                                 v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
778                                                 if (insidebox || TriangleOverlapsBox(v[0], v[1], v[2], info->lightmins, info->lightmaxs))
779                                                 {
780                                                         if (info->svbsp_insertoccluder)
781                                                         {
782                                                                 if (!(currentmaterialflags & MATERIALFLAG_NOCULLFACE) && r_shadow_frontsidecasting.integer != PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]))
783                                                                         continue;
784                                                                 if (currentmaterialflags & MATERIALFLAG_NOSHADOW)
785                                                                         continue;
786                                                                 VectorCopy(v[0], v2[0]);
787                                                                 VectorCopy(v[1], v2[1]);
788                                                                 VectorCopy(v[2], v2[2]);
789                                                                 if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], true, NULL, NULL, 0) & 2))
790                                                                         continue;
791                                                                 addedtris = true;
792                                                         }
793                                                         else
794                                                         {
795                                                                 if (info->svbsp_active)
796                                                                 {
797                                                                         VectorCopy(v[0], v2[0]);
798                                                                         VectorCopy(v[1], v2[1]);
799                                                                         VectorCopy(v[2], v2[2]);
800                                                                         if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], false, NULL, NULL, 0) & 2))
801                                                                                 continue;
802                                                                 }
803                                                                 if (currentmaterialflags & MATERIALFLAG_NOCULLFACE)
804                                                                 {
805                                                                         // if the material is double sided we
806                                                                         // can't cull by direction
807                                                                         SETPVSBIT(info->outlighttrispvs, t);
808                                                                         addedtris = true;
809                                                                         if (!(currentmaterialflags & MATERIALFLAG_NOSHADOW))
810                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
811                                                                 }
812                                                                 else if (r_shadow_frontsidecasting.integer)
813                                                                 {
814                                                                         // front side casting occludes backfaces,
815                                                                         // so they are completely useless as both
816                                                                         // casters and lit polygons
817                                                                         if (!PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]))
818                                                                                 continue;
819                                                                         SETPVSBIT(info->outlighttrispvs, t);
820                                                                         addedtris = true;
821                                                                         if (!(currentmaterialflags & MATERIALFLAG_NOSHADOW))
822                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
823                                                                 }
824                                                                 else
825                                                                 {
826                                                                         // back side casting does not occlude
827                                                                         // anything so we can't cull lit polygons
828                                                                         SETPVSBIT(info->outlighttrispvs, t);
829                                                                         addedtris = true;
830                                                                         if (!PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]) && !(currentmaterialflags & MATERIALFLAG_NOSHADOW))
831                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
832                                                                 }
833                                                         }
834                                                 }
835                                         }
836                                         if (addedtris)
837                                         {
838                                                 SETPVSBIT(info->outsurfacepvs, surfaceindex);
839                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
840                                         }
841                                 }
842                         }
843                 }
844         }
845 }
846
847 static void R_Q1BSP_CallRecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, qboolean use_svbsp)
848 {
849         if (use_svbsp)
850         {
851                 double origin[3];
852                 VectorCopy(info->relativelightorigin, origin);
853                 if (!r_svbsp.nodes)
854                 {
855                         r_svbsp.maxnodes = max(r_svbsp.maxnodes, 1<<18);
856                         r_svbsp.nodes = (svbsp_node_t*) Mem_Alloc(r_main_mempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
857                 }
858                 info->svbsp_active = true;
859                 info->svbsp_insertoccluder = true;
860                 for (;;)
861                 {
862                         SVBSP_Init(&r_svbsp, origin, r_svbsp.maxnodes, r_svbsp.nodes);
863                         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
864                         // if that failed, retry with more nodes
865                         if (r_svbsp.ranoutofnodes)
866                         {
867                                 // an upper limit is imposed
868                                 if (r_svbsp.maxnodes >= 2<<22)
869                                         break;
870                                 Mem_Free(r_svbsp.nodes);
871                                 r_svbsp.maxnodes *= 2;
872                                 r_svbsp.nodes = (svbsp_node_t*) Mem_Alloc(tempmempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
873                         }
874                         else
875                                 break;
876                 }
877                 // now clear the surfacepvs array because we need to redo it
878                 memset(info->outsurfacepvs, 0, (info->model->nummodelsurfaces + 7) >> 3);
879                 info->outnumsurfaces = 0;
880         }
881         else
882                 info->svbsp_active = false;
883
884         // we HAVE to mark the leaf the light is in as lit, because portals are
885         // irrelevant to a leaf that the light source is inside of
886         // (and they are all facing away, too)
887         {
888                 mnode_t *node = info->model->brush.data_nodes;
889                 mleaf_t *leaf;
890                 while (node->plane)
891                         node = node->children[(node->plane->type < 3 ? info->relativelightorigin[node->plane->type] : DotProduct(info->relativelightorigin,node->plane->normal)) < node->plane->dist];
892                 leaf = (mleaf_t *)node;
893                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
894                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
895                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
896                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
897                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
898                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
899                 if (info->outleafpvs)
900                 {
901                         int leafindex = leaf - info->model->brush.data_leafs;
902                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
903                         {
904                                 SETPVSBIT(info->outleafpvs, leafindex);
905                                 info->outleaflist[info->outnumleafs++] = leafindex;
906                         }
907                 }
908         }
909
910         info->svbsp_insertoccluder = false;
911         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
912         if (developer.integer >= 100 && use_svbsp)
913         {
914                 Con_Printf("GetLightInfo: svbsp built with %i nodes, polygon stats:\n", r_svbsp.numnodes);
915                 Con_Printf("occluders: %i accepted, %i rejected, %i fragments accepted, %i fragments rejected.\n", r_svbsp.stat_occluders_accepted, r_svbsp.stat_occluders_rejected, r_svbsp.stat_occluders_fragments_accepted, r_svbsp.stat_occluders_fragments_rejected);
916                 Con_Printf("queries  : %i accepted, %i rejected, %i fragments accepted, %i fragments rejected.\n", r_svbsp.stat_queries_accepted, r_svbsp.stat_queries_rejected, r_svbsp.stat_queries_fragments_accepted, r_svbsp.stat_queries_fragments_rejected);
917         }
918 }
919
920 void R_Q1BSP_GetLightInfo(entity_render_t *ent, vec3_t relativelightorigin, float lightradius, vec3_t outmins, vec3_t outmaxs, int *outleaflist, unsigned char *outleafpvs, int *outnumleafspointer, int *outsurfacelist, unsigned char *outsurfacepvs, int *outnumsurfacespointer, unsigned char *outshadowtrispvs, unsigned char *outlighttrispvs, unsigned char *visitingleafpvs)
921 {
922         r_q1bsp_getlightinfo_t info;
923         VectorCopy(relativelightorigin, info.relativelightorigin);
924         info.lightradius = lightradius;
925         info.lightmins[0] = info.relativelightorigin[0] - info.lightradius;
926         info.lightmins[1] = info.relativelightorigin[1] - info.lightradius;
927         info.lightmins[2] = info.relativelightorigin[2] - info.lightradius;
928         info.lightmaxs[0] = info.relativelightorigin[0] + info.lightradius;
929         info.lightmaxs[1] = info.relativelightorigin[1] + info.lightradius;
930         info.lightmaxs[2] = info.relativelightorigin[2] + info.lightradius;
931         if (ent->model == NULL)
932         {
933                 VectorCopy(info.lightmins, outmins);
934                 VectorCopy(info.lightmaxs, outmaxs);
935                 *outnumleafspointer = 0;
936                 *outnumsurfacespointer = 0;
937                 return;
938         }
939         info.model = ent->model;
940         info.outleaflist = outleaflist;
941         info.outleafpvs = outleafpvs;
942         info.outnumleafs = 0;
943         info.visitingleafpvs = visitingleafpvs;
944         info.outsurfacelist = outsurfacelist;
945         info.outsurfacepvs = outsurfacepvs;
946         info.outshadowtrispvs = outshadowtrispvs;
947         info.outlighttrispvs = outlighttrispvs;
948         info.outnumsurfaces = 0;
949         VectorCopy(info.relativelightorigin, info.outmins);
950         VectorCopy(info.relativelightorigin, info.outmaxs);
951         memset(visitingleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
952         memset(outleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
953         memset(outsurfacepvs, 0, (info.model->nummodelsurfaces + 7) >> 3);
954         if (info.model->brush.shadowmesh)
955                 memset(outshadowtrispvs, 0, (info.model->brush.shadowmesh->numtriangles + 7) >> 3);
956         else
957                 memset(outshadowtrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
958         memset(outlighttrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
959         if (info.model->brush.GetPVS && r_shadow_frontsidecasting.integer)
960                 info.pvs = info.model->brush.GetPVS(info.model, info.relativelightorigin);
961         else
962                 info.pvs = NULL;
963         RSurf_ActiveWorldEntity();
964
965         if (r_shadow_frontsidecasting.integer && r_shadow_compilingrtlight && r_shadow_realtime_world_compileportalculling.integer && info.model->brush.data_portals)
966         {
967                 // use portal recursion for exact light volume culling, and exact surface checking
968                 Portal_Visibility(info.model, info.relativelightorigin, info.outleaflist, info.outleafpvs, &info.outnumleafs, info.outsurfacelist, info.outsurfacepvs, &info.outnumsurfaces, NULL, 0, true, info.lightmins, info.lightmaxs, info.outmins, info.outmaxs, info.outshadowtrispvs, info.outlighttrispvs, info.visitingleafpvs);
969         }
970         else if (r_shadow_frontsidecasting.integer && r_shadow_realtime_dlight_portalculling.integer && info.model->brush.data_portals)
971         {
972                 // use portal recursion for exact light volume culling, but not the expensive exact surface checking
973                 Portal_Visibility(info.model, info.relativelightorigin, info.outleaflist, info.outleafpvs, &info.outnumleafs, info.outsurfacelist, info.outsurfacepvs, &info.outnumsurfaces, NULL, 0, r_shadow_realtime_dlight_portalculling.integer >= 2, info.lightmins, info.lightmaxs, info.outmins, info.outmaxs, info.outshadowtrispvs, info.outlighttrispvs, info.visitingleafpvs);
974         }
975         else
976         {
977                 // recurse the bsp tree, checking leafs and surfaces for visibility
978                 // optionally using svbsp for exact culling of compiled lights
979                 // (or if the user enables dlight svbsp culling, which is mostly for
980                 //  debugging not actual use)
981                 R_Q1BSP_CallRecursiveGetLightInfo(&info, (r_shadow_compilingrtlight ? r_shadow_realtime_world_compilesvbsp.integer : r_shadow_realtime_dlight_svbspculling.integer) != 0);
982         }
983
984         rsurface.entity = NULL; // used only by R_GetCurrentTexture and RSurf_ActiveWorldEntity/RSurf_ActiveModelEntity
985
986         // limit combined leaf box to light boundaries
987         outmins[0] = max(info.outmins[0] - 1, info.lightmins[0]);
988         outmins[1] = max(info.outmins[1] - 1, info.lightmins[1]);
989         outmins[2] = max(info.outmins[2] - 1, info.lightmins[2]);
990         outmaxs[0] = min(info.outmaxs[0] + 1, info.lightmaxs[0]);
991         outmaxs[1] = min(info.outmaxs[1] + 1, info.lightmaxs[1]);
992         outmaxs[2] = min(info.outmaxs[2] + 1, info.lightmaxs[2]);
993
994         *outnumleafspointer = info.outnumleafs;
995         *outnumsurfacespointer = info.outnumsurfaces;
996 }
997
998 void R_Q1BSP_CompileShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist)
999 {
1000         dp_model_t *model = ent->model;
1001         msurface_t *surface;
1002         int surfacelistindex;
1003         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
1004         r_shadow_compilingrtlight->static_meshchain_shadow_zfail = Mod_ShadowMesh_Begin(r_main_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
1005         R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
1006         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
1007         {
1008                 surface = model->data_surfaces + surfacelist[surfacelistindex];
1009                 if (surface->texture->basematerialflags & MATERIALFLAG_NOSHADOW)
1010                         continue;
1011                 R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, r_shadow_compilingrtlight->cullmins, r_shadow_compilingrtlight->cullmaxs, surface->mins, surface->maxs);
1012         }
1013         R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist, ent->mins, ent->maxs);
1014         r_shadow_compilingrtlight->static_meshchain_shadow_zfail = Mod_ShadowMesh_Finish(r_main_mempool, r_shadow_compilingrtlight->static_meshchain_shadow_zfail, false, false, true);
1015 }
1016
1017 extern cvar_t r_polygonoffset_submodel_factor;
1018 extern cvar_t r_polygonoffset_submodel_offset;
1019 void R_Q1BSP_DrawShadowVolume(entity_render_t *ent, const vec3_t relativelightorigin, const vec3_t relativelightdirection, float lightradius, int modelnumsurfaces, const int *modelsurfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
1020 {
1021         dp_model_t *model = ent->model;
1022         msurface_t *surface;
1023         int modelsurfacelistindex;
1024         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
1025         // check the box in modelspace, it was already checked in worldspace
1026         if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
1027                 return;
1028         if (ent->model->brush.submodel)
1029                 GL_PolygonOffset(r_refdef.shadowpolygonfactor + r_polygonoffset_submodel_factor.value, r_refdef.shadowpolygonoffset + r_polygonoffset_submodel_offset.value);
1030         if (model->brush.shadowmesh)
1031         {
1032                 R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
1033                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
1034                 {
1035                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1036                         if (R_GetCurrentTexture(surface->texture)->currentmaterialflags & MATERIALFLAG_NOSHADOW)
1037                                 continue;
1038                         R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
1039                 }
1040                 R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist, ent->mins, ent->maxs);
1041         }
1042         else
1043         {
1044                 projectdistance = lightradius + model->radius*2;
1045                 R_Shadow_PrepareShadowMark(model->surfmesh.num_triangles);
1046                 // identify lit faces within the bounding box
1047                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
1048                 {
1049                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1050                         rsurface.texture = R_GetCurrentTexture(surface->texture);
1051                         if (rsurface.texture->currentmaterialflags & MATERIALFLAG_NOSHADOW)
1052                                 continue;
1053                         RSurf_PrepareVerticesForBatch(false, false, 1, &surface);
1054                         R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface.vertex3f, rsurface.modelelement3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
1055                 }
1056                 R_Shadow_VolumeFromList(model->surfmesh.num_vertices, model->surfmesh.num_triangles, rsurface.vertex3f, model->surfmesh.data_element3i, model->surfmesh.data_neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist, ent->mins, ent->maxs);
1057         }
1058         if (ent->model->brush.submodel)
1059                 GL_PolygonOffset(r_refdef.shadowpolygonfactor, r_refdef.shadowpolygonoffset);
1060 }
1061
1062 void R_Q1BSP_DrawShadowMap(entity_render_t *ent, const vec3_t relativelightorigin, const vec3_t relativelightdirection, float lightradius, int modelnumsurfaces, const int *modelsurfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
1063 {
1064         dp_model_t *model = ent->model;
1065         msurface_t *surface;
1066         int modelsurfacelistindex;
1067         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
1068         // check the box in modelspace, it was already checked in worldspace
1069         if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
1070                 return;
1071         if (model->brush.shadowmesh)
1072         {
1073                 R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
1074                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
1075                 {
1076                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1077                         if (R_GetCurrentTexture(surface->texture)->currentmaterialflags & MATERIALFLAG_NOSHADOW)
1078                                 continue;
1079                         R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
1080                 }
1081                 R_Shadow_ShadowMapFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, 0, 0, model->brush.shadowmesh->element3i, numshadowmark, shadowmarklist);
1082         }
1083         else
1084         {
1085                 projectdistance = lightradius + model->radius*2;
1086                 R_Shadow_PrepareShadowMark(model->surfmesh.num_triangles);
1087                 // identify lit faces within the bounding box
1088                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
1089                 {
1090                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1091                         rsurface.texture = R_GetCurrentTexture(surface->texture);
1092                         if (rsurface.texture->currentmaterialflags & MATERIALFLAG_NOSHADOW)
1093                                 continue;
1094                         RSurf_PrepareVerticesForBatch(false, false, 1, &surface);
1095                         R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface.vertex3f, rsurface.modelelement3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
1096                 }
1097                 R_Shadow_ShadowMapFromList(model->surfmesh.num_vertices, model->surfmesh.num_triangles, rsurface.vertex3f, rsurface.vertex3f_bufferobject, rsurface.vertex3f_bufferoffset, model->surfmesh.data_element3i, numshadowmark, shadowmarklist);
1098         }
1099 }
1100
1101 #define BATCHSIZE 1024
1102
1103 static void R_Q1BSP_DrawLight_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
1104 {
1105         int i, j, endsurface;
1106         texture_t *t;
1107         msurface_t *surface;
1108         // note: in practice this never actually receives batches), oh well
1109         R_Shadow_RenderMode_Begin();
1110         R_Shadow_RenderMode_ActiveLight(rtlight);
1111         R_Shadow_RenderMode_Lighting(false, true, false);
1112         R_Shadow_SetupEntityLight(ent);
1113         for (i = 0;i < numsurfaces;i = j)
1114         {
1115                 j = i + 1;
1116                 surface = rsurface.modelsurfaces + surfacelist[i];
1117                 t = surface->texture;
1118                 rsurface.texture = R_GetCurrentTexture(t);
1119                 endsurface = min(j + BATCHSIZE, numsurfaces);
1120                 for (j = i;j < endsurface;j++)
1121                 {
1122                         surface = rsurface.modelsurfaces + surfacelist[j];
1123                         if (t != surface->texture)
1124                                 break;
1125                         RSurf_PrepareVerticesForBatch(true, true, 1, &surface);
1126                         R_Shadow_RenderLighting(surface->num_firstvertex, surface->num_vertices, surface->num_firsttriangle, surface->num_triangles, ent->model->surfmesh.data_element3i, ent->model->surfmesh.data_element3s, ent->model->surfmesh.ebo3i, ent->model->surfmesh.ebo3s);
1127                 }
1128         }
1129         R_Shadow_RenderMode_End();
1130 }
1131
1132 #define RSURF_MAX_BATCHSURFACES 8192
1133
1134 void R_Q1BSP_DrawLight(entity_render_t *ent, int numsurfaces, const int *surfacelist, const unsigned char *trispvs)
1135 {
1136         dp_model_t *model = ent->model;
1137         msurface_t *surface;
1138         int i, k, kend, l, m, mend, endsurface, batchnumsurfaces, batchnumtriangles, batchfirstvertex, batchlastvertex, batchfirsttriangle;
1139         qboolean usebufferobject, culltriangles;
1140         const int *element3i;
1141         msurface_t *batchsurfacelist[RSURF_MAX_BATCHSURFACES];
1142         int batchelements[BATCHSIZE*3];
1143         texture_t *tex;
1144         CHECKGLERROR
1145         culltriangles = r_shadow_culltriangles.integer && !(ent->flags & RENDER_NOSELFSHADOW);
1146         element3i = rsurface.modelelement3i;
1147         // this is a double loop because non-visible surface skipping has to be
1148         // fast, and even if this is not the world model (and hence no visibility
1149         // checking) the input surface list and batch buffer are different formats
1150         // so some processing is necessary.  (luckily models have few surfaces)
1151         for (i = 0;i < numsurfaces;)
1152         {
1153                 batchnumsurfaces = 0;
1154                 endsurface = min(i + RSURF_MAX_BATCHSURFACES, numsurfaces);
1155                 if (ent == r_refdef.scene.worldentity)
1156                 {
1157                         for (;i < endsurface;i++)
1158                                 if (r_refdef.viewcache.world_surfacevisible[surfacelist[i]])
1159                                         batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1160                 }
1161                 else
1162                 {
1163                         for (;i < endsurface;i++)
1164                                 batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1165                 }
1166                 if (!batchnumsurfaces)
1167                         continue;
1168                 for (k = 0;k < batchnumsurfaces;k = kend)
1169                 {
1170                         surface = batchsurfacelist[k];
1171                         tex = surface->texture;
1172                         rsurface.texture = R_GetCurrentTexture(tex);
1173                         // gather surfaces into a batch range
1174                         for (kend = k;kend < batchnumsurfaces && tex == batchsurfacelist[kend]->texture;kend++)
1175                                 ;
1176                         // now figure out what to do with this particular range of surfaces
1177                         if (!(rsurface.texture->currentmaterialflags & MATERIALFLAG_WALL))
1178                                 continue;
1179                         if (r_waterstate.renderingscene && (rsurface.texture->currentmaterialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION)))
1180                                 continue;
1181                         if (rsurface.texture->currentmaterialflags & MATERIALFLAGMASK_DEPTHSORTED)
1182                         {
1183                                 vec3_t tempcenter, center;
1184                                 for (l = k;l < kend;l++)
1185                                 {
1186                                         surface = batchsurfacelist[l];
1187                                         tempcenter[0] = (surface->mins[0] + surface->maxs[0]) * 0.5f;
1188                                         tempcenter[1] = (surface->mins[1] + surface->maxs[1]) * 0.5f;
1189                                         tempcenter[2] = (surface->mins[2] + surface->maxs[2]) * 0.5f;
1190                                         Matrix4x4_Transform(&rsurface.matrix, tempcenter, center);
1191                                         R_MeshQueue_AddTransparent(rsurface.texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST ? r_refdef.view.origin : center, R_Q1BSP_DrawLight_TransparentCallback, ent, surface - rsurface.modelsurfaces, rsurface.rtlight);
1192                                 }
1193                                 continue;
1194                         }
1195                         batchnumtriangles = 0;
1196                         batchfirsttriangle = surface->num_firsttriangle;
1197                         m = 0; // hush warning
1198                         for (l = k;l < kend;l++)
1199                         {
1200                                 surface = batchsurfacelist[l];
1201                                 RSurf_PrepareVerticesForBatch(true, true, 1, &surface);
1202                                 for (m = surface->num_firsttriangle, mend = m + surface->num_triangles;m < mend;m++)
1203                                 {
1204                                         if (trispvs)
1205                                         {
1206                                                 if (!CHECKPVSBIT(trispvs, m))
1207                                                 {
1208                                                         usebufferobject = false;
1209                                                         continue;
1210                                                 }
1211                                         }
1212                                         else if (culltriangles)
1213                                         {
1214                                                 if (r_shadow_frontsidecasting.integer && !PointInfrontOfTriangle(rsurface.entitylightorigin, rsurface.vertex3f + element3i[m*3+0]*3, rsurface.vertex3f + element3i[m*3+1]*3, rsurface.vertex3f + element3i[m*3+2]*3))
1215                                                 {
1216                                                         usebufferobject = false;
1217                                                         continue;
1218                                                 }
1219                                         }
1220                                         if (batchnumtriangles >= BATCHSIZE)
1221                                         {
1222                                                 r_refdef.stats.lights_lighttriangles += batchnumtriangles;
1223                                                 Mod_VertexRangeFromElements(batchnumtriangles*3, batchelements, &batchfirstvertex, &batchlastvertex);
1224                                                 // use the element buffer if all triangles are consecutive
1225                                                 if (m == batchfirsttriangle + batchnumtriangles)
1226                                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, batchfirsttriangle, batchnumtriangles, ent->model->surfmesh.data_element3i, ent->model->surfmesh.data_element3s, ent->model->surfmesh.ebo3i, ent->model->surfmesh.ebo3s);
1227                                                 else
1228                                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, 0, batchnumtriangles, batchelements, NULL, 0, 0);
1229                                                 usebufferobject = true;
1230                                                 batchnumtriangles = 0;
1231                                                 batchfirsttriangle = m;
1232                                         }
1233                                         batchelements[batchnumtriangles*3+0] = element3i[m*3+0];
1234                                         batchelements[batchnumtriangles*3+1] = element3i[m*3+1];
1235                                         batchelements[batchnumtriangles*3+2] = element3i[m*3+2];
1236                                         batchnumtriangles++;
1237                                 }
1238                         }
1239                         if (batchnumtriangles > 0)
1240                         {
1241                                 r_refdef.stats.lights_lighttriangles += batchnumtriangles;
1242                                 Mod_VertexRangeFromElements(batchnumtriangles*3, batchelements, &batchfirstvertex, &batchlastvertex);
1243                                 // use the element buffer if all triangles are consecutive
1244                                 if (m == batchfirsttriangle + batchnumtriangles)
1245                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, batchfirsttriangle, batchnumtriangles, ent->model->surfmesh.data_element3i, ent->model->surfmesh.data_element3s, ent->model->surfmesh.ebo3i, ent->model->surfmesh.ebo3s);
1246                                 else
1247                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, 0, batchnumtriangles, batchelements, NULL, 0, 0);
1248                         }
1249                 }
1250         }
1251 }
1252
1253 //Made by [515]
1254 void R_ReplaceWorldTexture (void)
1255 {
1256         dp_model_t              *m;
1257         texture_t       *t;
1258         int                     i;
1259         const char      *r, *newt;
1260         skinframe_t *skinframe;
1261         if (!r_refdef.scene.worldmodel)
1262         {
1263                 Con_Printf("There is no worldmodel\n");
1264                 return;
1265         }
1266         m = r_refdef.scene.worldmodel;
1267
1268         if(Cmd_Argc() < 2)
1269         {
1270                 Con_Print("r_replacemaptexture <texname> <newtexname> - replaces texture\n");
1271                 Con_Print("r_replacemaptexture <texname> - switch back to default texture\n");
1272                 return;
1273         }
1274         if(!cl.islocalgame || !cl.worldmodel)
1275         {
1276                 Con_Print("This command works only in singleplayer\n");
1277                 return;
1278         }
1279         r = Cmd_Argv(1);
1280         newt = Cmd_Argv(2);
1281         if(!newt[0])
1282                 newt = r;
1283         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1284         {
1285                 if(/*t->width && !strcasecmp(t->name, r)*/ matchpattern( t->name, r, true ) )
1286                 {
1287                         if ((skinframe = R_SkinFrame_LoadExternal(newt, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, true)))
1288                         {
1289 //                              t->skinframes[0] = skinframe;
1290                                 t->currentskinframe = skinframe;
1291                                 t->currentskinframe = skinframe;
1292                                 Con_Printf("%s replaced with %s\n", r, newt);
1293                         }
1294                         else
1295                         {
1296                                 Con_Printf("%s was not found\n", newt);
1297                                 return;
1298                         }
1299                 }
1300         }
1301 }
1302
1303 //Made by [515]
1304 void R_ListWorldTextures (void)
1305 {
1306         dp_model_t              *m;
1307         texture_t       *t;
1308         int                     i;
1309         if (!r_refdef.scene.worldmodel)
1310         {
1311                 Con_Printf("There is no worldmodel\n");
1312                 return;
1313         }
1314         m = r_refdef.scene.worldmodel;
1315
1316         Con_Print("Worldmodel textures :\n");
1317         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1318                 if (t->numskinframes)
1319                         Con_Printf("%s\n", t->name);
1320 }
1321
1322 #if 0
1323 static void gl_surf_start(void)
1324 {
1325 }
1326
1327 static void gl_surf_shutdown(void)
1328 {
1329 }
1330
1331 static void gl_surf_newmap(void)
1332 {
1333 }
1334 #endif
1335
1336 void GL_Surf_Init(void)
1337 {
1338
1339         Cvar_RegisterVariable(&r_ambient);
1340         Cvar_RegisterVariable(&r_lockpvs);
1341         Cvar_RegisterVariable(&r_lockvisibility);
1342         Cvar_RegisterVariable(&r_useportalculling);
1343         Cvar_RegisterVariable(&r_q3bsp_renderskydepth);
1344
1345         Cmd_AddCommand ("r_replacemaptexture", R_ReplaceWorldTexture, "override a map texture for testing purposes");
1346         Cmd_AddCommand ("r_listmaptextures", R_ListWorldTextures, "list all textures used by the current map");
1347
1348         //R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
1349 }
1350